Liquid fuel burner



June 27, 1950 J. D. PETERSON 2,512,964

'LIQUID FUEL BURNER n I @le 2 x Pen/Zim 40 BWJWWQJ Gttornegs June 27, 1950 J. D. PETERSON LIQUID FUEL BURNER Filed Nov. l5, 1946 3 sheets-sheet 2 June 27, 1950 J, D, PETERSON 2,512,964

LIQUID FUEL BURNER Filed Nov. 15, 194s a sheets-sheet s :inventor J Pc erga/7 Gttomeg ,s

Patented June 27, 1950 uN-lr ED STAT Es v l 2,512,964'

LIQUID FuEL-'UnNnrr-f- John D. Petersonolton,NLC; Application November 15, 194s, serial No. violer My invention hasfor its object to provide an tobacco barns, and which is of the wickless type capable OfDurningvloW grade oil`as'tlie fuel.

Afurth'er objectfofmy invention is to provide an oilhea-ter .having'la burner-v to ywhich the fuel oil'issuppliedfat its centeran'ddistributed 'radially over a liot plate to 'elecuthe vaporization of its volatile constituenta.the` excess Flow being trapped in one or more concentric annular depressionenwhiclrincrease the surface' area of thebu'rnersand :aid in` tl'refl'lrtherrvapor'izatonof the fuel.

A- still l furtherliobj ect of "my invention oompre= hends a yburnerffor.'fuel oil comprising an annu-I lar hot plate Vlfavinga centralfoilfreceivingzchamber and al surrounding annular-channel contain= nga di'spersingiring which; li'kethe plate is automatically heated andin combination' therewith; aids in the vol'atilizing` of' the products of combustion. f

Furthermore' my' inventionV hase-lor its object-to incorporateea burner having' the aoredescrib'ed characteristics inl Combination:with`- a surroundL ing drum which'has the dual functiony'of serving as aradiator andas the means of directing acirculation of air around the burner together with aninterior down' draftl chamber-mounted centrally abovev the'burner tol supplyr air for combustion,gsaid'casing and chamber combining to also prov-idethe/desired heatedI air `for circulation throughout the lbuilding in which theapparatus ils-installed? To these andother ends my 'invention'has for its object to` provide further improvements in construction; all -as Will'lbefully described in the accompanying specification, the-novel features thereofrbeing-set forthV invthe'lappended claims.

.erreur ore-leef 2- dispersing rings which comprisepart'o the burner.-

Figure 7 isa topplan-viewof the:` central downdraft chamber;` v

FigureV 8is"a sideL elevation of `the -centraldispersing cone forming .f part of 'thee burner fwhich is'showninsection onFig; 1. i f

Figure 9 isa detail-illustrationshowingal-mod ication in inheemse-sectional shape offoneof the l`oil recess channel-sand 'the ring.tlf1erein.'

Similar reference -charactersin' the'fsefveral gures indicatesimilarpa-rts=` Theheater and burner` combination comprising my invention, asatfpresent-YillustratedinFig: 1, comprisesanoutercylindrical casing-1 lsurroundinga burner -in 'thefform-of'a at plate-2=located slightly above its-lowerI end i onI an' -annulusr 3 within 'the casing.'V In `practiced mount these parts on a con-crete foundationcompr-ising afplatform-or door #surrounding-a centra-l well ,frfrom the lower end of which is a lateral air passagev of ample dimensions, the outer endofwvhich veX- tendsv beyond ythe. foundations. ofthe?v building to `beheated .andserves ,to .furnis-h af continuous supply of )fresh outside airv beneath .theheaterl The burner, 2 is. vrr-lounted centrally. over, sa-id Well andis removablymountedonthe Iring 3rv the latter beingcsupported onv anum'berpf. adjustable .levelingscrews 3a projecting` downwardly from its lower side with their lower endsresting on -the platform 4. By, adjusting oneorlanother ofthe screws the burner may Vbe.accurately main-.- tained in a horizontal. `plane which lisdesirable for its most eiectiveoperation.

Afree circulationof air beneath andaround the casing I is obtained Aby `supporting/its, lower edge a short distance above the platform and to this end Ilprovidedt with legs I. Aportion of this air also enters the casingthroughalseries of apertures or perforations in the periphery of thering 3.

The casing I is closed by a cover 8;and-dis posed centrallyf therein is acylndrical Vchamber Il open at its ends .fonsupplyinga down-draft for the burner. This.y chamber is .adjustable Verticallyhaving at itslowen end .a cross barr I D .having a central perforation bymeans of vwhich it is guided on an upwardlyprojectingpin -Iton the burner, Vits movement orsetting relatively, to the latter being effectedbyatseries oispirally arlranged perforations at its upper end with any one of which there maybe engaged a pin I 5ay removably guided in anceye I6 on theY top of the cover 8.

Flues A I 'I andi Sextendlaterallyirom the., sides of. the casing I near itsv `topJ and4 forp the, .purpose of effectively directing the products of combus- 3 tion thereto I provide deflecting bales I9 which curve outwardly and upwardly from a common central point above the burner.

At a point at one side of the casing it is pro- 1 vided `with a door 20 which affords access to the burner and located above the casing is a flat deflector 2|. Thisl I support on arms 22 havmg at their lower ends cylindrical strap portions 23 therein is affected by exterior air currents blow--` ing against it and by using such a deector it is possible to counteract such currents and obtain a more even distribution of the heat generated throughout the building.

The burner 2 which I employ is essentially one designed for the burning of low grade fuel oil and when first put into operation isheated by burning thereon a handful of oil soaked waste, or the like, to raise its temperature to a point where the fuel oil is Yvaporized, following which its continued operation is automatic.

At the center of the plate 2 is an inverted truncated conical cavity or recess 25, the annular sloping walls of which extend upwardly from a flat bottom to the surrounding horizontal surface of the plate. The fuel oil is introduced into thiscavity from a nozzle 26 having lateral discharge openings. 'Ihe nozzle is threaded into the bottom of the plate 2 and is supplied with oil, preferably by gravity, through a pipe 2'! provided with a control valve 28 and connected to a supply tank exterior of the building and leading to the burner through the air duct B and well 5. Y

The volume of oil supplied to the cavity 25 is regulated somewhat by a cover piece 29 having a dome which fits over the nozzle and is provided with an annular bevelled edge paralleling that of the cavity 25 within which it is supported by a series of narrow ribs 30 of such thickness that only a narrow channel is provided for the escape and feeding of the oil onto the surrounding face of the plate 2.

It is essential in the operation of a burner in which the oil is fed directly to a heated surface for causing its vaporization that provision be made for its operation over varying periodsy of time'under varying operating conditions without the personal attention of an operator and to this end `and also to increase the efciency of the burner I have providedadditional features to` be presently set forth. Surrounding the oil feed well or cavity 25 and spaced therefrom. as shown in Figs. 1 and 5, is an annularrecess 35 which ispreferably semi-circular in. oros-s section. Fitted therein isa similarly shaped ring 36 of such dimensions that there exists between itslower curved face and the face ofthe recess a narrow channel.v Inv the operation of the burner the ring becomes heated, along with the plate 2, hence any oil which hasnot been consumed and flows `outwardly on the face of the plate is trapped in the recessl 35 and the thin layer thereof is further subjected to the volatilizing eifect of this heated channel and its ring. It is for this same reasonv that I also provide a second outer annular recess`31 which will receive excess oil that in burning may expand and fail to'burn off in the fliS mentioned recess. A second ring, similar to ring 36, may be mounted in recess 31 but in practice I have not found such to be necessary.

I have made provision to dispose of excess oil, as may occur at certain times, as for instance if the supply has been excessive before the burner has reached a generating-temperature, by forming a depression or sump 38 in the bottom of recess 35 and placing in communication therewith an overflow pipe 39. The latter I also connect to the bottom of the outer recessI 31 .to provide for the escape of any liq-uid oil that may under any circumstances reach this point. The sump being circular has a considerable area and therefore to control its intake I provide on the lower side of the ring 36 a bead 40 fitting somewhat loosely therein. These parts/ being cast their tting together is not of machined accuracy so it will be seen that when the burner is in operation oil that may flow into the recess 35 in excess of that which is volatilized will pass oft` to the outlet. The bead also serves'to center the ring in its recess and if des-ired the ring may be further supported by laterally extending wings 4I overlying the face of plate 2.

While I have shown the circular recess 35 as semi-circular in cross section it will be understood that it may be shaped otherwise and in Fig. 9 I have indicated the recess 35a provided with inclined side wallsand the ring 36a therein similarly formed. y

I claim:r

1. A liquid fuel burner comprising a plate adapted to be heated having a, horizontal upper surface provided with a central oil well and a surrounding recess spaced therefrom semi-circular in cross section, a cover for said well, said cover and plate being spaced apart to provide a narrow outlet therebetween communicating the well with the face of the plate, a ring semicircular in :cross section fitting into said recess, means for holding said ring in spaced relation with said semicircular recess to provide a narrow channel therebetween for the reception of oil owing outwardly on the face of the plate, and an oil supply nozzle discharging into said well.

2. A liquid fuel burner comprising a plate adapted to be heated having a horizontal upper surface provided with a central oil well and a surrounding recess spaced therefrom semi-circular in cross section and containing a narrow sump in the bottom thereof, a cover for said well, said cover and plate .being spaced apart to yprovide a narrow outlet therebetween communicating the well with the face of the plate, a. ring semi-circular in cross section fitting in said recess and having a bead loosely iitting'said sump for controlling the flow of oil into the sump, means for holding said ring in spaced relation with said semi-circular recess to provide a continuous narrow channel therebetween for Vthe reception of oil flowing outwardly on the face of the plate, and a source of oil supply for the central oil well.

3. A liquid fuel burner :comprising a plate adapted to be heated having ahorizontal upper surface provided with a central oil well and a surrounding recess spaced therefrom semi-circular in cross section and containing a, narrow sump in the bottom thereof, a cover for said well, said cover and plate being spaced apart to provide a narrow outlet therebetween communicating the well with the face of the plate, a ring semi-circular in cross section tting in said recess and having a bead loosely fitting said sump for controlling the flow of oil into the sump, means for holding said ring in spaced relation with said semi-circular recess to provide a continuous narrow channel therebetween for the reception of oil flowing outwardly on the face of the plate, a second recess surrounding said first recess serving to receive oil on the face of the plate escaping beyond said inner recess, and an oil supply pipe feeding into the central oil well.

4. A liquid fuel burner comprising a plate adapted to be heated having a horizontal upper surface provided with a central oil well and a surrounding recess spaced therefrom semi-circular in crosssection and containing a narrow sump in the bottom thereof, a cover for said well, said cover and plate being spaced apart to provide a, narrow outlet therebetween communicating the well with the face of the plate, a ring semi-circular in cross section fitting in said recess and having a bead loosely tting said sump for controlling the iiow of oil into the sump, means for holding said ring in spaced relation with said semi-circular recess to provide a continuous narrow channel therebetween for the reception of oil flowing outwardly on the face of the plate, a second recess surrounding said first recess serving to receive oil on the face of the plate escaping beyond said inner recess, overow means associated with each of said recesses for removal of excess liquid oil therein, and an oil supply nozzle discharging into the central well.

' JOHN D. PETERSON.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number lName Date 612,118 Myers oct. 11, 1898 1,594,520 Hiett Aug. 3, 1926 1,687,888 Post Oct. 16, 1928 1,749,990 Tolley Mar. 11, 1930 1,827,294 LeDaum et al. Oct. 13, 1931 1,948,857 Hoeft Feb. 27, 1934 1,987,487 Moore Jan. 8, 1935 2,082,990 Tolley et al. June 8, 1937 2,225,203 Barnes Dec. 17, 1940 2,288,083 Gainey June 30, 1942 2,365,119 Tharrington Dec. 12, 1944 2,442,465

Long et al. June 1, 1948 

